About Measure-PD.com
From home, you can measure your pupillary distance at no charge on Measure-PD.com, a site operated by OptiSpan Vision Inc. There is nothing for sale here and you never need to create an account.
Who Runs Measure-PD.com?
This site is owned and run by OptiSpan Vision Inc., located at 2100 Powers Ferry Road SE, Suite 400, Atlanta, GA 30339, United States. We do not work as an optician, an eye doctor or a glasses shop, and no shop we mention gives us any payment.
How the Camera Measurement Works
The width of a standard bank or credit card is 85.60 mm wherever it was issued, because such cards follow the ID-1 card size; confirm yours is full size before starting. Hold one under your nose and take a photo while it sits there. Then mark both pupil centres and both ends of the card. The tool works in pixels: it takes the pupil gap, divides by the card width, then multiplies by 85.60 for a millimetre answer.
Taking a second photo helps catch slips: two results within 1 mm mean the marks were placed the same way, yet a tilted card or one held in front of your face can cause the same error in both. An optician's measurement is the one to trust for strong or progressive lenses, or any time precision matters.
Your Photo Stays on Your Device
The photo is opened and read by the browser on your own device. We never upload, store or view it. The image is removed when you close the page.
Where Our Numbers Come From
We base our average PD figures on 3,976 adults taken from the US Army ANSUR survey in the analysis by Dodgson (2004). Cleveland Clinic is our source for general PD guidance; ANSI Z80.1 for lens tolerances; and each manufacturer's specification page for VR headset ranges. Every number we show is linked to its source.
A Measurement, Not a Prescription
A PD is a single measurement: it is not an eye test. A lab uses it to centre lenses, but it cannot say whether you need glasses or what strength they should be. For an eye exam, visit an optometrist or ophthalmologist.